The A/D bits exist entirely for the operating system's benefit. The Accessed bit tells the OS which pages have been recently used, enabling page replacement algorithms to choose pages to evict when memory runs low. The Dirty bit tells the OS which pages have been modified and must be written back to disk before eviction; clean pages can simply be discarded and re-read from disk later.
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It has a range of ports including AC outlets, a USB-C port (input/output), USB-A ports, a Quick Charge 3.0 port, and a DC car port, so you can power or charge up to six devices at once.，详情可参考im钱包官方下载